equivalent of std.functional.partial for templates?

[Steven Schveighoffer]

On Wednesday, 11 August 2021 at 14:08:59 UTC, Paul Backus wrote:
> On Wednesday, 11 August 2021 at 14:03:50 UTC, Paul Backus wrote:
>> On Wednesday, 11 August 2021 at 14:00:33 UTC, Steven 
>> Schveighoffer wrote:
>>> I have a template function like this:
>>>
>>> ```d
>>> auto foo(T, Args...)(Args args) {...}
>>> ```
>>>
>>> If I try to bind the T only, and produce a partial template 
>>> function which can accept any number of parameters, but has T 
>>> already specified, I get an error, because instantiating 
>>> `foo!T` means Args is length 0.
>>
>> https://phobos.dpldocs.info/std.meta.ApplyLeft.html
>
> Should have read further--this does not work with template 
> functions due to [issue 1807.][1] My mistake.
>
> [1]: https://issues.dlang.org/show_bug.cgi?id=1807

So first, I though ApplyLeft would work, but I convinced myself 
it was focused on applying the template to arguments 
individually, but that's just the example used. ApplyLeft is 
exactly what I'm looking for, but as you said (and as my example 
shows), it doesn't work in this case. It would be nice to have 
something that would work (or make ApplyLeft work via a compiler 
change).

Thanks for the nudge!

-Steve